Photographic bath tank



Dec. 6, 1927.

J. D. HAYES PHOTOGRAPHIC BATH TANK Filed Nov. 50, 1925 ATTORNEYS Patented Dec. 6, 1927;

UNITED TAres P TENT JAMES J). HAYES, o DALLAs, TEXAS, ASSIGNOR, BY DIRECI- AND MESNE ASSIGN- MENTS, 0F ONE-THIRD TO BEVERLY WHITE, 0E cnroaso, ILLINOIS, AND ONE- THIRD .TO PAU LVHUNTER, OF SAN ANTONIO, TEXAS.

PHOTOGRAPHIC BATH TANK.

- Application filed November 30,1925. Serial No. 72,275. B

My invent-ion relates to improvements in photographic bath tanks, and it consists in the combinations, constructions, and arrangements herein described and claimed.

In. the developing of pictures, the negatives are immersed. in a tank of water and the Water is allowed to flow into the tank by means of the open top of the tank, and

then to flow out over-the edges of the tank.

Due to the inertia of the water, the water disposed at the bottom of the tank comes to rest and therefore the portions of the negatives disposed in this water will-notbe Washed free of chemicals as are the portions of the negatives disposed adjacent to the running water. If a negative is not entirely cleaned'of chemicals, it willcontinue to fade out after it has been removed from the tank, even though this fading out will be 8X,- tremely slow. This is the reason why some negatives after being filed away for six months or a year or longer will have a portion thereof blurred or slightly faded, while the other portion is clear.

It is obvious that if the water were caused to flow along the entire surfaces of the negatives for a length of; time sufficient to entirely wash away the chemicals, a print Would result that would last indefinitely without fading.

The principal objectof the presentinven- .tion is to provide a-photographic bath tank which causes the water to flow over the entire surface of each negative,-whereby all of the chemicals will be washed away, thus providing anegative which will last indefinitely without fading.

A further object ofmy invention is to provide a photographic bath tank which is extremely simple in construction, durable and eflicient for the purpose intended.

Other objects and advantages will appear in the followig specification, and the novel features of the invention will be particularly pointed out in the appended claim.

My invention is illustrated in the accompanying drawings, forming a part of this application, in which 7 Figure 1 is a vertical section through the device, and

Figure 2 is a plan view of Figure 1.

In carrying out my invention, I provide a bath tank 1 which is divided into two compartments A and B. The compartment A has its walls 2 and 3 projecting above the top of the compartment B for a purpose hereinafter described. The partition 4 dividing. the-tank into the two compartments terminates a short distance above the bottom 5 of the tank. 7

In the compartment B, I dispose a number of negatives 6 and mount them in the manner shown. Figure 2 shows how the strips 7 supporting the negatives straddle the upper edges 8 of the compartmentB. These strips support the negatives 6'.

From the foregoing description of the" various parts of the device, the operation thereof ma bereadily understood. Water is conveye to the compartment A from a faucet 9 and this water will build up in the compartment A and will flow through the aperture'10 into the compartment B. After the compartment B has been entirely filled with water, the water'will continue to rise in the compartment A until it establishes a head of water that will cause the water in thev compartment B to overflow in the manner shown in Figure 1. It will be seenv from this construction that the entire body of water in the compartment B is constantly changed due to the fact that the water is admitted at the bottom of the compartment B and overflows at the top. The flow of the water is indicated by the arrows and the arrows show how the water flows along the entire surfaces of all of the. negatives 6.

The negatives are kept immersed in the water a sutiicient length of time to permit the water to wash away all of the chemicals from the negatives. The entire negative will be washed instead of only a portion thereof due to the novel arrangement of the compartments A and B and the aperture 10. In this way, all of the chemicals will be washed from the entire surface of each negative, thus providing negatives which will never fade. v

I claim:

A device of the type described comprising a tank having a water-receiving compartment and a negative-washing compartment a short distance from and in parallel relation with the bOll'OHl of said. tank, whereby the "nter in the vnter-n-vceiviug l'mnpal'tment may be maintained, at a level above the upper edgvof H10 negativewashing mmpartn'lent and the force of the, water within the waterweceiving cnmpartment will force the WMGI from (he water-receiving compartment beneath Raid partition and along the lmllmm of said tank where it will be allowed (0 lillFQ upwardly on both sides of the negalivus: and owl the upper edges of the megal'fn'c-wnr hing FOMILWIUKWHI.

JA MES D. HAYES. 

